profile2_regpath_form_alter not general enough

There is a problem with the way profile2_regpath attaches fields to user register form.
One case is described here http://drupal.org/node/1440738#comment-5993478 but I think that a lot of situations where the form is altered through AJAX may experience this kind of annoyances. The effect is that after adding or removing fields to the form dynamically you can loose all the 'profile section' of the form array. The source of the problem is in the way _get_profile_types_by_path() works. In the above described situations it returns nothing

function profile2_regpath_form_alter(&$form, &$form_state, $form_id) {
  // Check to see if we're building this form for a block.
  if (strpos($form_id, 'profile2_regpath_form_block_') === 0) {
    $profile_types = profile2_regpath_get_profiles(NULL, NULL, $form_state['profile_type_id']);
    profile2_regpath_attach_profile_fields($form, $form_state, $form_id, $profile_types);
  }
  elseif ($form_id == 'user_register_form') {
    // Get profile2 profile types from current path.
    $profile_types = _get_profile_types_by_path();
    profile2_regpath_attach_profile_fields($form, $form_state, $form_id, $profile_types);
  }
}

We should find a more robust way that succeeds in managing these situations.